Lock-bolt-operating mechanism



Jan. 13. 1925.

1523,346 E. O. MURMANN LOCK BOLT OPERATING MECHANISM 4 .Filed Feb. 8, 1925 2 Sheets-Sheet l INVENTOR. Eye/2e O. Mar/Wam? BY Wm 11H( ATTORNEYS.

`1,523,346 E. O. MURMANN Loox BOLT OPERATING MEcHANIsM 2 Sheets-Sheet 2 Filed Feb. 8, 1923 l INVENTOR. 27e/7e O. /WW/wm/ BY WmM/fe v ATTORNEYS.

Patented dan. 13, 1925.

EUG-ENE O. MURMANN, F GLENDALE, CALIFORNIA.

LOCK-BOLT-OPERATING MECHANISM.

Application filed February 8, 1923. Serial No. 617,713.

To all whom t may concer/11..'

Be it known that I, EUGENE O. MUR- MANN, a citizen of the United States, and resident of Glendale, in the county of Los Angeles and State of California, have inlvented new and useful Improvements in a Lock-Bolt-Operating Mechanism, of which the following is a specification.

This invention relates to improvements in locks, and pertains particularly to the mechanism for protracting andk retracting the bolt. The present invention is especially adaptable forv embodiment in a mortise lock operable by a key actuable mechanism. It is in some cases desirable that when the bolt is protracted it be 'deadlocked and when retracted it be held against protraction, except as effected by the bolt operating mechanism.

This invention contemplates the movement of the bolt to its full protracted or retracted position by means of a partial rotation of the key or of a knob. In pres ent devices, when the key is used without complete rotation, it is impossible to withdraw it afterprotraction or retraction. An object of the present invention is to provide a mechanism of the character described which will permit withdrawal of the key( after protraction or retraction. Other objects are the provision of a simple, compact, positively operating structure which may be easily installed in the door.

These objects together with other objects and corresponding accomplishments areobtained by means of the embodiment of my invention illustrated in the accompanying drawing, in which: Y

Fig. l is a perspective view partially in section showing aA fragment of the door with my improved lock installed therein; Fig. 2 is a section through Vthe mechanism as seen on the line 2-2 of Fig. 3; Fig. 3 is a section as seen on the line 3 3 of Fig. 2; Fig. 4 is a view similar.` to Fig. 2 showing the parts in another position; Fig. 5 is a perspective view of the lock barrel; Fig. 6 is a perspective view kof the cylinder plug and cam; Fig. 7 is a perspective view of the idlerl arm; Fig. 8 is a perspective view of a plate for the barrel; Fig. 9 is a perspective view of the knob shank and cam; Fig. 10 is a perspective view of the bolt; and Fig. 11 is a perspective view of the case for the key mechanism.

Referring more particularly to the drawing, the invention is shown embodied in a mortise lock, which can be installed by boring cylindrical recesses in a door instead of cutting retangular recesses, as is new the usual practice. However, the invention is not limited to such a construction. A door is indica-ted by A, and has a cylindrical recess extending from the edge thereof. Disposed therein is the bolt member indicated by B. Extending from one face of the door to the other and intersecting the bolt member recess is a. cylindrical recess for the bolt operating member C. The present invention is embodied in the bolt operating member.

Referring more particularly to the details of the bolt member, it comprises a tubular member l2, to the end of which is secured a selvage or face plate 13. An opening is cut in the member l2 and a catch lug lst upset therefrom at one end. An opening is provided inv the selvage plate for a bolt 15. The bolt has a tail 16 pivotally secured thereto. The tail has on its under side a coupling notch 17 to receive the idler arm finger 33 and notches 18 and 18 for deadlocking the bolt, thus, forming a catch. A leaf spring 19 is secured to the upper side of the tail and presses against the tubular casing tending to force the tail downwardly.

The bolt actuating member comprises a plate 2O adapted to cover one end of the door recess and a barrel body 2l preferably formed integral therewith. At the other end of the body is a flange 22 having spacing lugs 23 formed thereon. The spacing lugs have threaded apertures for screws, wherebyT a plate 24 may be fastenedfthereto. The plate 22 is also provided with threaded openings to receive screws 2:5 serving to hold au cscutcheon plate 26 in position. The barrel body is provided with a bore in which the lock cylinder` plug 27 is disposed. The plug ,and barrel are preferably of the well known cylinder lock type, the details of which are well known and need not be described herein. However, uponinsertion of the proper key in the keyhole of the lock, the plug is released from the barrel so that it may bc rotated. l The end of the plug is provided with a cam 28, best shown in Fig. 6. This cam has a cylindrical surface concentric with the axis of the plug. Its operating face comprises a portion 29,10w at the center and high at the ends. This operating portion is symmetrical. It is providedivithshoulders Where it joinsfthe cylindrical surface.

Then the cylinder plug 27 is in position in the barrel, cam 28 is spaced romflange22 so that the cylinder plug extends beyond the barrel. Mounted upon this-extension is the idler arm7 it comprises a ring 3() having an elongated opening therein 'and an arm 31 exitending therefrom in the direction of the majoraxis'. Projecting inwardly from the side 'of the arm is a rib 32. At the end of thelarm, and extending laterally is a finger 33:' The 'tingeris adapted "for disposa-lin the'notch 17. The idler arniis mounted upon the cylinder plug 27 betiveen the ange 22'and the cam 28 so that vit may be raised and lowered. The lower shoulder ot the rib 32 'rides upon the cam surface 29* so that rotation' oit the cylinder plug lto the limit ot its travelin either.direction-Will raise the idlerarm and thereby raise the tail. of' the bolt. i

'The knob shank best shown in Fig. 9,

comprises a stem 3lvto which a collar35 is The bolt :tube is inserted into the door. Next the housing containing theA bolt operating mechanism)l is inserted. The escutcheon plate 2G is then placed oi'er'the opening with the `stem 34 of the knob shank extending therethrough. Screws 25 are passed through:

the lescutcheon lplate and secured to the-body. Theknob. 37 is then fastened tothe stem.

When the bolt operating mechanism is inserted, linger 33 is disposed' in notch 17 of they 'tail of the bolt.

The spring'19 presses the tail'toivard the bottom of the tube and in retracted position,

the lug-111 'would be `disposed in notch 18, thereby yforming a catch andA preventingmovement `olf-thelbolt. To lock 'thedoorg the key-may be inserted in theplugand thelatter ,'turned; This turns the \ca.m28,^ther'e-f by first lifting the idler `arm and raising the lug 14 releasing the catch.; Further rotation ot the key 'causes the shoulder on the cam to engage lthe idler arm and lswing the latter, v

thereby `protracting the bolt'. The key lis notv"fturiied 4back tor-Withdrawal.- This causes the tail vto drop, but? does not rotate the-idlerai'in.- The tailydrops so `that lug- 14- enters notch- 18van'dthebolt is deadlocked. The key is in position to be ivithdrawnp To unlock-the door, the key is inserted kand the cylinder rotated" in the opposite direction. The idler arm is first raised,

thereby lifting `the tail 16 so that the notch 70 18 is clear Aot liig'14."'Tli opposite shoulder on the cam 28 YnonT engages the idler ai'm and swings the latter, causing the bolt to berretracted;W'TotWithdra-W the key it is turned backward into its normal position, thereby permitting the idler-arm 4to loiverand the' lug 1l toengageathenotch 18. The'bolt may be 'protracted and `retracted by turning the knob 37 in a mannerfsim-ilar to the-'keyw The cam-E 36 Vengages the 'idler arm and '3 va-ctuat'es; it in--the same-'manner that theo keyy actuated it, v

lVhat I claimr isi.

1.111 a lock,` the `coinbinatioirfof V*a key actuated rotatablecylinder, anv idlerfarm pivotallyV unounted to swing Yin the same: diL il rectionl-` as saidrcylinder,abutment means on said-cyli'ndertoengagezsaidl Yidler arm andfmove the latter, 'ivlierebylsaid idler -arm hasa lostmotion with respect to said cylin'w 90 dei, a boltop'erable by fsaididlerfarm, and-i` a 'catch to deadlock-said boltoperatedtoA release thelatter by movement otsaid abut ment means.

2. In` al lock, fthecombination of? akey 9 actuated rotatable cyl'inderyan idler'armn pivot-ally mountedonsaid cylinder so asto v swing in thesame direction,V abutment means Y 4on saidfcylindertoengage-said idler arm and inove the latter,V 'whereby said idler arm -1100 vhas a lost-*motion -ivith'respectto said cylinder,- a bolt operable by saidmidler arm, and* a catch to deadlock said bolt-operated to release thelatt'er by movement of said abutmentf means. f

3. In a lock, the combination of `a key* actuatedrotatable -cylindervfan idlerarmAVV pivotally'mounted on the axis of saidcylin-Y der;l abutment means 4`on said cylinder to engage said idler arm and move the latter, whereby said idleifarmdias alost--niotion.l

with respectito said cylinder, a bolt operable* by said idler arm.; `and a-catch to-'deadlock said bolt-operated/to 'release vthe latter by -inovemcnt ot said abutmentmeans..

ftA structureot the-character described comprising a stationary deadlocking-lug, .a

slidable bolt having a tailYpivotallysecured ,i `thereto 'and having ,lockingf'iiotclieson itsi lower tace 'tor engagement with saiddeadl lockinglugya key actuated rotatable device2 tailA sothat'thenotchylS is lifted abovethe tail to disengalgeit froma deadlockinglug,1

said' mechanical movementl comprisinrlgalost motion means to slide-said bolt at the limitLy of its lifting rmovement and then permit key Without the sliding of said bolt. l

va reverse rotation sufficientto Withdraw the Y 5. A structure of the character described comprising a slidable bolt, a key actuated rotatable device, a lost motion means connecting said device and said bolt whereby partial rota-tion of said device Will slide said bolt and at the limit ot its movement will permit a reverse rotation sutlicient to Withdran7 the key without sliding said bolt, characterized by the lost motion means comprising an idler arm, a cam secured to said rotatable device and having spaced abutments :t'or sivinging said idler arm and a cam surface between said abutment-s With a loW point intermediate.

G. A structure of the character described comprising a stationary deadlocking lug, a slidable bolt having a tail pivotally secured thereto and having locking notches o-n its lower `tace Yfor engagement With said deadlocking lug, a key actuated rotatable device, lost motion means connecting said device and said bolt whereby partial rotation of said device will rst litt said tail to disengage it from a deadlocking lug and then slide said bolt and at the limit of said movement will permit a reverse rotation suiiicient to WithdrawT the key Without the sliding of said bolt characterized by the lost motion means comprising an idler arm, a cam secured to said rotatable device and having spaced abutments for engaging said idler arm with a. low point intermediate said abutment, a finger extending laterally of said arm, and said tail having a notch in which said finger may be disposed.

7. A structure of the character described comprising a stationary deadlocking lug, a slidable bolt having a tail pivotally secured thereto and having locking notches on its lovver face for engagement with said deadlocking lug, a key actuated rotatable device, an idler arm, a cam secured to said rotatable device and having spaced abutments for swinging said idler arm and a cam surface between said abutments with a low point intermediate and a second cam having spaced abutments for swinging said idler arm and a cam surface between said abutments With a low point intermediate.

In Witness that I claim the foregoing I have hereunto subscribed my name this 27th day of January, 1923.

EUGENE O. MURMANN. 

